Improved apparatus for boring cylinders



L. B. MANDERS. APPARATUS POR BORING GYLINDERS.

No. 66,011, Patented June 2.5, 186.7.

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@gaine tstrs @anni @frn L. B. FLANDERS, 0F PHILADELPHIA, PENNSYLVANIA.Letters Patent l-Vo. 66,011, dated June 25, 1867.

IMPROVBD APPARATUS FOB. BORING GYLINDEBS,

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TOV ALL WHOM IT MAY CONCERN:

' Bc it known thatI, L. B. FLAN-DERS, of Philadelphia, Pennsylvania,have invented certain Improved Mechanism for Boring Cylinders; and I dohereby declare the following to be a full, clear, and exact descriptionof the same, reference being had to the accompanying drawing, and to theletters of reference marked thereon.

My invention consists of certain devices,'fully described hereafter, tobe used in connection with mechanism for boring out horizontal,inclined, or vertical cylinders, without removing them from theirfoundations. y

In order to enable others skilled in the art to make and use myinvention, I will now proceed to describe its construction andoperation. On reference to the accompanying drawing, which forms a partof this specification- Fig'ure 1 is a sectional plan view of my improvedmechanism for boring out cylinders, 8vo.

Figure 2, a transverse vertical section on the line 1-2, iig. 1.

Figure 3, a transverse section on the line 3 4, iig. 1, showing thecutting-head.

Figures 4 and 5, enlarged views Vof one of the bearings through whichthe boring-bar passes.

Figure 6, an outside view of the feeding device, with the case insection; and

Figure 7 a longitudinal section of the feeding device.

Similar letters` refer to similar parts throughout the several views.

lA represents,- a cylinder, from which both heads have been removed, andwhich, in the present instance, is horizontal. B is the boring-bar,which has a longitudinal groove, a', for apurpose described hereafter.To' the iiange b, at one end of'the cylinder, is secured a cross-plate,C, by means of suitable bolts, c, in such a manner that the said platecan be readily adjusted laterally on the flange. The central portion ofthis plate C is made in the form of a ring, (iig. 2,) through which passfour set-screws, the latter serving to confine and adjust: within thering the sleeve D, in which the boring-bar turns. A similar cross-plate,G,'is secured to the flange b of the cylinder by bolts c', and abearing, E, Vis secured to the same by set-screws. On reference to figs.4 and 5, it will been that the bearing E, in which the boring-bar turns,consists of two parts, d and d', secured to cach other by bolts e.Between these two parts of the bearing E is a split ring,f, throughwhich the bring-bar passes, this vring being contracted by a screw, f',when it becomes necessary to prevent the barfrom moving endways. In theportion d of the bearing is a conicallrecess, in which ts a conicalsplit ringhg, and

. against the outer edge of the latter bears another ring, g', which hasa greater diameter than either of the others, and which s'secured to thebearing-E by` means of set-screws z. By tightening them the split ringis forced into `thc conical recess in the bearing, and its diameterlthereby lessenedf-an operation which becomes necessary, from time totime, as the bearing wears. The cutting-head F is secured by means of akey, jio the boring-bar at any desired point, and is substantially the4same as that described in my patent of September 20, 1864being providedwith three or more outters, 7', secured by means of plates j', (see fig.3,) and the cutters being maintained at a proper distance from thecentre by means of studs la screwing into the hub'Z of, thecutting-head, at the outer end of the boring-bar B, is a cog-wheel, 'mfand the" bar is made tubular throughout a portion of'its length for thereception of the feeding-screw G', which is secured at one end to anadjustable plate, H, which may be boltedto ormay bear againstA anystationary object. The cog-wheel yn, on the end of theboring-bar, iscontainedin a oasing, I, andjgears into Va cog-wheel, j?, which turns ona pin secured to the case, and the latter wheel gears into au'otherwheel, q, .on a hollow spindle, fr, (iig. 7,) into which its a'rod, sfand through and near the end of the latter passes 'a pin,s, whichprojects from each side of the rod, and through slots formed in thespindle r into grooves t in the cogwheel g.k 4"By the action of a spiralspring, u, on the rod s, the pin s has a constant tendency to remain inthese grooves t, but by pressing upon the end of the rod s, the springis compressed, and the pin c passes from the grooves t into a circularrecess in the cog-wheel q, thereby'enabling the latter to turn freelyaround, and independently of the spindle rf The object of thisarrangement willbe apparent hereafter. 0n ,the spindle r, and in anothercompartment of the casing I, is a cog-wheel, v, and the spindleterminates in a hand-wheel, vl. Gearing into the wheel v is a largercog-wheel, v2, which turns on a projecting portion of the casing I,andwhose centre coincides with that of the boring-bar'. On the face ofthe cogwheel ozwis a nut, tu, in which are formed'threads correspondingwith thpse cut upon the feeding-screw G. The casing I is prevented fromrevolving with the boring-bar by means of a'tongue, a', (iig.

projecting from a portion of the casingvinto a groove, x', which extendsthe entire length ot' the stationary feeding-screw G.

The several partsA having been arranged as described, and the boring-barand cutting-head moved to that end of thecylinder from which the boringis to commence, motion is communicated to the boring-bar by any suitableappliances. As the boring-bar revolves andthe casing I remainsstationary, motion is communicated from the cog-wheel m to the wheel p,then to the wheels g' and v upon the hollow spindle e, and thence tothe. larger cogwheel v2, and nut w, thereby causing the casing I, itstrain of wheels, and the boring-bar to move longitudinally on thestationary screw G. When it is desired to move the boring-bar andcutting-head quickly to any particular point in the cylinder, the Arod sis first forced into the hollow spindle r until the pin s passes fromthe grooves t of the cog-wheel q into the circular recess formed in thesaine; thevhand-wlieel o on the spindle r is then turned, causing thecog-wlieels o and o2 to revolve, while .the wheel q, which has beenthrown out of gear, remains stationary. As the` cog-wheel v2 revolves,the boring-bar and cutting-head will be quickly forced through thecylinder by means of the nut w and feeding-screw, without revolving. Itis sometimes necessary, in boring a cylinder, to draw back thecutting-bead for the purpose of re-boring a particular part; this may bedone, Without-stopping the rotary motion of the boring-bar, by throwingthe cog-wheel q out ot' gear.- Tbe wheel m, and consequently the wheelsp and q, will continue 4to revolve, but` tliespiiiclle r will remainstationary until operated by the handle el, by nneaiisiot` which, asbefore described, the cutting-head may be drawn back to the desiredpoint. When the cutting-head has to be used for facing the ends oiflanges of the cylinders, the feeding device is thrown out of gear, andthe bar is held stationary by tightening the split ring f.

I claim as my invention, and desire to secure by Letters Patent- 1. Thecombination of the boring-bar B, the casing I, its train ofwheels'herein described, or the equivalent to the same, the nut w, andthe stationary feeding-screw Gr, the whole b'eing arranged and operatingsubstantially as described. y

2. The cog-wheel g, its circular recess and grooves t t, in combinationwith the hollow spindle r and the rod s,vwith its pin s and spiralspring u., the whole being arranged and operating substantially in themanner and for the purpose set forth.

3. The bearing E, in coinbina-tion with the adjustable and conical splitring g md ringg, Op its quivalent, the Whole being constructed andarranged substantially as described,

4. The split ringfin combination with the bearing E, asaiid foithepurpose described.

. s. j f-,-.-,l-M ,.i In testimony whereof I have sigiiediny name tothis specification inthe pi esenoe of tno subscribing w itnesfcs@ L. B.FLANDERS.

Witnesses WM. HALL WAXLER, W'. J, R. DELANY.

